Franken motor!

[lord_verminaard]

Yes i had read that it was borrowed from Malone.

since then i have made even better pumps!!

when you do send his pump in, pls leave all the settings alone
so i can run it on the Test Stand and measure what fuel you're
running to rach that magic 200HP!

look forward to new projects too.

We're currently working on some TDI nozzles that will flow way more
fuel and help the M-TDI projects that allot of people are asking for.

Devor is trying to run a big turbo on his and we're running out of fuel
with his stock and modded injectors.

i'll keep everyone up to date.

Giles

Woah!  Any chance these will be a little cheaper than KermaTDI's R520 7-hole nozzles?  Plus, Kerma won't sell them to you unless you have Kerma's tuning.  :?  (which personally I think is shady)

Brendan

[MJF]

I see,Well thats sounds about right.What were you torque #'s ?

Didnīt get torque readings from dyno, but itīs around 350nm.

[zukgod1]

[tīs GT2359V, ~47mm inducer with ~35psi boost. I know Iīm pushing the turbo way over limits, but the engine needs boost to make power :?

At what point do we start to worry about bending rods?

30 psi?
35 psi?
40 psi?


Anyone? I actually really need to know this one, I'm also very curious as Dave's engine is obviously very capable of high boost #'s and I think I remember reading he has a stock bottom end.

[MJF]

Itīs the low end torque that bends rods...

[zukgod1]

Itīs the low end torque that bends rods...

Ok so..??

What does that mean? Build a fresh engine and stuff 25psi in there are we wadding up rods?

The reason I ask besides my curiousity in reguards to Daves engine.
My current set up will pull good (no tach yet) while in 3rd to 20 psi where it dies off a bit till 25 psi the it takes right off again and will touch 38psi on the top end  :shock:

I dont hold it there btw, hits it for a sec and that's it.

[MJF]

It means that youīll more likely bend rods with small turbo. The lower rpm torque peaks, harder it is for rods. Itīs not the amount of boost itself.
Language barrier starts to kick, maybe someone understand and translate it to english :lol:

[zukgod1]

It means that youīll more likely bend rods with small turbo. The lower rpm torque peaks, harder it is for rods. Itīs not the amount of boost itself.
Language barrier starts to kick, maybe someone understand and translate it to english :lol:

I'm running a k24 so I dont get what I would consider "Good Boost" until 15+ psi.
It doesn't help I'm @ 4500' elevation either.

So I dont think i need to worry about low end torque in my situation?

[RabbitJockey]

i believe its the peak cylinder pressure that bends the rods, so unless you're really making power then 25psi should be fine.

[zukgod1]

i believe its the peak cylinder pressure that bends the rods, so unless you're really making power then 25psi should be fine.

Has to be close to 150 now. 10mm pump, huge injectors, only porting was port matching, 3" Turbo back.
Hmmm.

I'm done hijacking Dave's thread, I was just trying to figure out how his bottom end was going to hold up under high boost then started comparing his engine to mine so the questions ensued..

[Benjamin]

It means that youīll more likely bend rods with small turbo. The lower rpm torque peaks, harder it is for rods. Itīs not the amount of boost itself.
Language barrier starts to kick, maybe someone understand and translate it to english :lol:

rods dont like power/torque + high revs, the lower the revs, the more the rods like it.
aarghhh, i have the same problem mate, i'm running out of words  :lol:

Greetz, Benjamin

[zaprzal]

It means that youīll more likely bend rods with small turbo. The lower rpm torque peaks, harder it is for rods. Itīs not the amount of boost itself.
Language barrier starts to kick, maybe someone understand and translate it to english :lol:

rods dont like power/torque + high revs, the lower the revs, the more the rods like it.
aarghhh, i have the same problem mate, i'm running out of words  :lol:

Greetz, Benjamin

I understand it different way rods don't like high torque at low revs - same torque at higher revs is safer for rods... and more revs with same torque is more power  

[Benjamin]

true, i say the theory is vica versa, well, thats what i learned from gasoline engine's with high power (not talking about torque)

offopic: offtopic: @Zapral: do they make custom forged billed rods/pistons in Poland for nice prices?

Greetz, Benjamin

[DVST8R]

There are two different but equally bad force's that are being discussed here.

1. Low rev's and high cylinder pressures (high torque) can cause rods to bend, and hg leaks.

2. High rev's can get to the point where the rod strech's and either makes contact with a valve, or breaks from stress, or if the rod bolts are the first to give way it will spin a bearing.

I prefer to spin these engines faster (to a point), as the faster it is spun the more work is done (hp = work/torque) vs higher cylinder pressures. When you consider that gassers of this size typically have red lines of 7000rpm+ I don't think that 6000rpm is that much to ask for.

[935racer]

I see,Well thats sounds about right.What were you torque #'s ?

What cam plate are you using Dave?I think a 1.6 cam plate with 12 or 14mm head will work better for 5500 +rpm.The extra 1mm lift with the 1.9 camplate may not be neccesary with the bigger head.

I agree, currently have a 1.9td camplate.

[935racer]

Hey Dave

I have proven on my Test Stand that if you feed the injection pump with
more than a positive feed then it will increase the dynamic flow of the pump

if you decrease you static timing a bit to compensate for the increased
internal pressure which will give you more advance earlier on.

what static timing do you have it set at now?

hope this helps you get over 200
try 15 psi first

Giles

Giles, I am feeding the pump with 8psi currently, and I think about 30gph.
I am running 1.33mm static timing right now, its a lot but its the only way to get a cold start out of this thing, I actually could use a little more advance for cold start ups right now.
You can really hear that this is a lot of advance though at around 4000rpms, after that it sounds more normal.